Determination of the top quark mass from leptonic observables

Abstract

We present a procedure for the determination of the mass of the top quark at the LHC based on leptonic observables in dilepton $t\bar{t}$ events. Our approach utilises the shapes of kinematic distributions through their few lowest Mellin moments; it is notable for its minimal sensitivity to the modelling of long-distance effects, for not requiring the reconstruction of top quarks, and for having a competitive precision, with theory errors on the extracted top mass of the order of 0.8 GeV. A novel aspect of our work is the study of theoretical biases that might influence in a dramatic way the determination of the top mass, and which are potentially relevant to all template-based methods. We propose a comprehensive strategy that helps minimise the impact of such biases, and leads to a reliable top mass extraction at hadron colliders.

29 pages, 3 figures

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Cited by in corpus (9)

• Why should we care about the top quark Yukawa coupling?
• Effects of color reconnection on $t\bar{t}$ final states at the LHC
• What is the Top Quark Mass?
• Measurement of lepton differential distributions and the top quark mass in $t\bar{t}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Top-quark pair-production and decay at high precision
• Bump-hunting in LHC ttbar events
• Discrepancy between cosmological and electroweak observables in Higgs Inflation
• Hadronization systematics and top mass reconstruction
• Two-loop form factors for $P$-wave quarkonium production and decay